JPS5823008B2 - Multi-frequency antenna - Google Patents
Multi-frequency antennaInfo
- Publication number
- JPS5823008B2 JPS5823008B2 JP7490276A JP7490276A JPS5823008B2 JP S5823008 B2 JPS5823008 B2 JP S5823008B2 JP 7490276 A JP7490276 A JP 7490276A JP 7490276 A JP7490276 A JP 7490276A JP S5823008 B2 JPS5823008 B2 JP S5823008B2
- Authority
- JP
- Japan
- Prior art keywords
- antenna
- reflector
- primary radiator
- waveguides
- frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/40—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
- H01Q5/45—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements using two or more feeds in association with a common reflecting, diffracting or refracting device
Description
【発明の詳細な説明】
この発明は一次放射器系と反射体から構成されるアンテ
ナにおいて、特に反射体の改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an antenna composed of a primary radiator system and a reflector, and particularly relates to improvements in the reflector.
従来のパラボラアンテナ、オフセットパラボラアンテナ
では、数種類の周波数帯を、たとえばにバンド、Ｃバン
ドを同時に通信する場合、パラボラアンテナについて示
した第１図のようににバンド用、Ｃバンド用のパラボラ
アンテナを別々に配置しなければならない欠点があった
。With conventional parabolic antennas and offset parabolic antennas, when communicating in several frequency bands at the same time, for example band and C band, it is necessary to use parabolic antennas for band and C band as shown in Figure 1, which shows the parabolic antenna. There was a drawback that they had to be placed separately.
また第１図の点線で示した空間４が限られている場合、
アンテナを小さくしなければならなくなり、アンテナの
利得が開口径の２乗に比例するため、利得を高くするこ
とができない欠点があった。Furthermore, if the space 4 shown by the dotted line in Fig. 1 is limited,
The antenna had to be made smaller, and since the gain of the antenna was proportional to the square of the aperture diameter, there was a drawback that the gain could not be increased.
この発明は、これらの欠点を除去するため、１つのアン
テナで数種類の周波数帯を共用できるようにしたもので
、その目的はアンテナの利得を高くすることにある。In order to eliminate these drawbacks, the present invention enables one antenna to share several types of frequency bands, and its purpose is to increase the gain of the antenna.
第２図はこの発明の実施例であって、オフセットパラボ
ラアンテナで説明する。FIG. 2 shows an embodiment of the present invention, which will be explained using an offset parabolic antenna.
電磁波は、導波管内を通る時、導波管の径の寸法で決ま
る周波数より低い周波数が遮断され、反射されることを
利用したものである。When electromagnetic waves pass through a waveguide, frequencies lower than the frequency determined by the diameter of the waveguide are blocked and reflected.
第２図で矩形導波管を例にとると、一次放射器の開口に
焦点がくるような曲面にそって、多数の導波管の開口面
２ｂを配列することによって一つのアンテナとして働く
〇さらに一つ一つの導波管の内部に開口寸法の小さい導
波管を、その開口面が所定の曲面にそうように配列する
ことによって、さらに高い周波数の反射面２ｃとして働
かせ、さらに高い周波数は導波管を遮へいしている導電
性の面２ｄを反射面として働かせる。Taking a rectangular waveguide as an example in Fig. 2, it works as one antenna by arranging the apertures 2b of a large number of waveguides along a curved surface that focuses on the aperture of the primary radiator. Furthermore, by arranging waveguides with small apertures inside each waveguide so that their apertures form a predetermined curved surface, they act as reflecting surfaces 2c for even higher frequencies. The conductive surface 2d that shields the waveguide acts as a reflective surface.
このようにすることで、それぞれの反射面に対する焦点
をずらせ、その位置に一次放射器を設け、同時に３つの
周波数帯を通信することができる。By doing so, it is possible to shift the focus of each reflecting surface, provide a primary radiator at that position, and simultaneously communicate three frequency bands.
この様に矩形導波管を反射面として配列したときの、オ
フセットパラボラアンテナの反射面の正面図を第３図に
示す。FIG. 3 shows a front view of the reflecting surface of an offset parabolic antenna when rectangular waveguides are arranged as reflecting surfaces in this manner.
したがって、この反射面を利用して、パラボラアンテナ
の反射体に使用し、３周波数帯を同時に通信する例を第
４図に示す。Therefore, FIG. 4 shows an example in which this reflecting surface is used as a reflector of a parabolic antenna to simultaneously communicate in three frequency bands.
またカセグレンアンテナの副反射鏡に使用した例を第５
図に示す。Also, an example of using it as a sub-reflector of a Cassegrain antenna is shown in the 5th section.
As shown in the figure.
このような構造になっているから、第１図の４のアンテ
ナの配置空間が限られている場合、一つの反射体で働か
せることができるので、アンテナの開口径を大きくでき
、アンテナの利得が、開口径の２乗に比例して高くなる
ので、アンテナの利得を高くすることができる。With this structure, if the space for installing the antenna 4 in Figure 1 is limited, it can be used with a single reflector, so the aperture diameter of the antenna can be increased and the gain of the antenna can be increased. , increases in proportion to the square of the aperture diameter, so the gain of the antenna can be increased.
なお、以上はオフセットパラボラアンテナについて説明
したが、この発明はこれに限らず、第４図に示したよう
に、パラボラアンテナの反射鏡に、また第５図に示した
ように、カセグレンアンテナの副反射鏡に使用してもよ
い。Although the above has described an offset parabolic antenna, the present invention is not limited to this.As shown in FIG. 4, the present invention can be applied to a reflector of a parabolic antenna, and as shown in FIG. May be used as a reflector.
以上のように、この発明に係る多周波共用アンテナでは
、反射体に、矩形または円形導波管を、開口が一次放射
器側に向くように多数配置１ルて、導波管の径により、
遮断周波数が決まることを利用し、周波数によって反射
面を変えることができるので、多くの周波数を共用でき
る。As described above, in the multi-frequency antenna according to the present invention, a large number of rectangular or circular waveguides are arranged in the reflector so that the openings face the primary radiator side, and depending on the diameter of the waveguides,
By taking advantage of the fact that the cutoff frequency is determined, the reflection surface can be changed depending on the frequency, so many frequencies can be shared.
よって、周波数による専用アンテナを別々に配置する必
要がなく、アンテナの配置空間を有効に利用でき、高利
得なアンテナが得られる効果を有する。Therefore, there is no need to separately arrange dedicated antennas for each frequency, and the antenna arrangement space can be used effectively, resulting in the effect that a high-gain antenna can be obtained.
第１図は従来の１周波数専用のパラボラアンテナを２つ
並べた時の正面図、第２図は本発明装置の一実施例の矩
形導波管を多数配置ｌルた反射体をもつオフセットパラ
ボラアンテナの断面図、第３図は、第２図の反射体の正
面図、第４図は本発明装置の一実施例の円形または矩形
導波管を多数配列した反射面をもつパラボラアンテナの
断面図、第５図は本発明装置の一実施例の副反射鏡に円
形または矩形導波管を多数配置［ルた反射体としだカセ
グレンアンテナの断面図である。
なお図中１ａは高い周波数帯の一次放射器、１ｂは低い
周波数帯の一次放射器、１ｃはさらに低い周波数の一次
放射器、２ａは従来のパラボラアンテナの反射鏡、２ｂ
は矩形導波管、２ｃは２ｂの内部の小さい径の導波管、
２ｄは導電性の反射板、３は電気的な反射面、４はアン
テナ配置の限界である。
なお図中、同一あるいは相当部分には、同一符号を付し
て示しである。Fig. 1 is a front view of two conventional parabolic antennas dedicated to one frequency arranged side by side, and Fig. 2 is an offset parabolic antenna with a reflector arranged in a large number of rectangular waveguides, which is an embodiment of the device of the present invention. 3 is a front view of the reflector shown in FIG. 2, and FIG. 4 is a sectional view of a parabolic antenna having a reflecting surface in which a large number of circular or rectangular waveguides are arranged, according to an embodiment of the device of the present invention. FIG. 5 is a sectional view of a reflector and a Cassegrain antenna in which a large number of circular or rectangular waveguides are arranged in the sub-reflector of an embodiment of the device of the present invention. In the figure, 1a is a primary radiator in a high frequency band, 1b is a primary radiator in a low frequency band, 1c is a primary radiator in an even lower frequency band, 2a is a reflector of a conventional parabolic antenna, and 2b is a primary radiator in a lower frequency band.
is a rectangular waveguide, 2c is a small diameter waveguide inside 2b,
2d is a conductive reflecting plate, 3 is an electrical reflecting surface, and 4 is a limit of antenna arrangement. In the drawings, the same or corresponding parts are designated by the same reference numerals.
Claims (1)
して矩形または円形の導波管をその開口が一次放射器側
に向けて、所定の曲面にそうように多数配置１ル、さら
にその導波管の内部に、一種類または多種類の開口寸法
の小さい導波管を、その開口が所定の曲面にそうように
配置１ル、導波管の終端は、所定の曲面にそうように導
電性の板で終端したことを特徴とする多周波共用アンテ
ナ。1 Consisting of a primary radiator system and a reflector, a large number of rectangular or circular waveguides are arranged as the reflectors on a predetermined curved surface with their openings facing the primary radiator, and the guide Inside the wave tube, one type or multiple types of waveguides with small opening sizes are arranged so that the openings lie on a predetermined curved surface. A multi-frequency antenna characterized by being terminated with a magnetic plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7490276A JPS5823008B2 (en) | 1976-06-24 | 1976-06-24 | Multi-frequency antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7490276A JPS5823008B2 (en) | 1976-06-24 | 1976-06-24 | Multi-frequency antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5352A JPS5352A (en) | 1978-01-05 |
| JPS5823008B2 true JPS5823008B2 (en) | 1983-05-12 |
Family
ID=13560774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7490276A Expired JPS5823008B2 (en) | 1976-06-24 | 1976-06-24 | Multi-frequency antenna |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5823008B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5860804A (en) * | 1981-10-07 | 1983-04-11 | Mitsubishi Electric Corp | Reflector antenna |
| JPS58205307A (en) * | 1982-05-25 | 1983-11-30 | Nippon Telegr & Teleph Corp <Ntt> | Multibeam antenna device |
| DE68907880T2 (en) * | 1988-12-24 | 1993-11-04 | Minoru Sangyo | PLASTIC BUMPER. |
-
1976
- 1976-06-24 JP JP7490276A patent/JPS5823008B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5352A (en) | 1978-01-05 |
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